Shire



3 Sheets- Sheet .1.V

Patented Oet Fzj H. C. S. DYER.

MANUPAGTURB 0F GOMPOUND ARMOR PLATES.

(No Model.)

(No Model.) 3 Sheets-Sheet 2. H. C. S. DYEB..

MANUFACTURE OP GOMPUUND ARMOR PLATES.

r y l Patented oct. 4, 1887.

' No Model.) s Smets-sheet 3.

H. C. S. DYER.

` MANUPAGTURE 0F GOMPOUND ARMOR PLATES. No. 371,129. Patented Oct. 4, 1887.

N, PETERS. mumognpr. washington D. t;

UNITED STATES PATENT OFFICE.

HENRY CLEMENT SWINNERTON DYER, OF WESTHOPE, COUNTY OF SHROP- SHIRE, ENGLAND.

NIANUFACTURE OF COMPOUND RIVIOR-PLATES.

SPECIFICATION forming part of Letters Patent No. 371,129, dated October 4, 1887.

Application filed November 8, 1886. Serial No. 218,822.

To all whom. it may concern:

Be it known that I, HENRY CLEMENT SWIN- NEEToN DYER, of Westhope, in the county of Shropshire, England, have invented ay certain new and useful Improvement in the Manufacture of Compound Armor-Plates, of which the following is a specification.

My object is to provide compound armorf plates which, while sufficiently hard to posro sess to the requisite degree the quality of impenetrability, shall also be of great toughness, so as to lessen the liability of fracture and decrease the extent of cracks resulting from the impact of projectiles. i5 To this end my improvement relates to the formation of compound armorplates of cast steel re enforced by bars of wrought-iron, or of steel tougher than the cast-steel of which the plates are mainly composed.

In accordance with my invention I form the plates by casting steel about the re-enforcing bars and then forging the compound plates so produced.

In the annexed drawings, which show several forms of compound plates, Figure I is a plan View with the re-enforcing bars represented by dotted lines; and Figs. l"h and 1b show sections on the lines G D and E F, respectively, of Fig. l. Fig. 2 is a View simi- 3o lar to Fig. l of another form of compound plate; and Figs. 2a and 2" show sections on the lines O D and E F, respectively, of Fig. 2. Fig. 3 is a view similar to Fig. l of another form of compound plate; and Figs. 3 and 3b show sections on the lines C D and E F, re-

spectively, of Fig. 3. Fig. 4 is a plan view similar to Fig. I of another form of compound plate; and Figs. et and 4l show sections on the lines C D and EF, respectively, of Fig. 4. 4o Fig. 5 is a view showing the re-enforcing bars in plan, with the mold in horizontal section preparatory to the admission to the mold of the molten metal; and Fig. Gis aseetion ofthe mold with the re-enforcing bars in ele- 4 5 vation ready for the casting of the steel. Fig. 7 is a plan of the completed armorplatc on a reduced scale.

In carrying out my invention I proceed as follows: The re-enforcing bars a, of wrought 5o iron or steel of requisite quality, after being made to the required form, are cleaned or pickled to free them from all oxide, or otherwise treated so as to prepare them most effect- (No model.)

ually forthe molten metal to adhere to their surfaces, and are then placed in the required position in a mold made in the ordinary manner. The reenforcing bars are of a length somewhat in excess of the dimensions of the interior ofthe mold and of the cast-steel portion of the compound plate to be produced, 50 so that when the bars are properly arranged their ends are embedded in the sides of the mold to support them, as shown by Figs. 5 and 6. The molten steel is then allowed to flow through the mold until the temperature of the bars is raised, so that the molten metal will readily adhere to them. The outlet in the mold is then closed, so as to allow the mold to be filled in the ordinary way; or the re-enforcing bars may first be heated to the required temperature and the molten metal then run into the mold, in the ordinary man` ner., The compound plate thus formed is removed from the mold and then forged to shape to form an ar1nor-plate, and hardened 75 and tempered in the ordinary manner.

The amount of forging in consolidating and compacting the compound plate will be regulated by circumstances; but preferably there is a reductionv to from one half to one- 8o third of the original thickness of the plate.

As shown in the accompanying drawings, the re-enforcing bars a of the plates may be near the face, near the back, or in the center of the cast-steel, b, to give toughnessand S5 power to resist fracture bythe impact of projectiles.

I am aware that it is not new, broadly considered, to produce a compound metal -plate by casting one metal about another, and I go do not unqualifiedly claim such a compound plate.

I claim as my invention- The manufacture of compound armor-plates ot' eaststeel and reenforcing bars of greater 95 toughness than the cast-steel by casting the steel about the bars and forging the compound plate so obtained, substantially as and for the purpose set forth.

HENRY CLEMENT SWINERTON DIER.

W'itnesses:

T. W. TnoMrsoN, Solicitor, NewcastleaponTyne.

V. THoMrsoN, Clerk to Messrs. Dees at' Thompson', Solicitors,

A'Iewcaserwon-Tyne. 

